TY - JOUR T1 - <em>Pseudomonas aeruginosa</em> adaptation and diversification in the non-cystic fibrosis bronchiectasis lung JF - European Respiratory Journal JO - Eur Respir J DO - 10.1183/13993003.02108-2016 VL - 49 IS - 4 SP - 1602108 AU - Yasmin Hilliam AU - Matthew P. Moore AU - Iain L. Lamont AU - Diana Bilton AU - Charles S. Haworth AU - Juliet Foweraker AU - Martin J. Walshaw AU - David Williams AU - Joanne L. Fothergill AU - Anthony De Soyza AU - Craig Winstanley Y1 - 2017/04/01 UR - http://erj.ersjournals.com/content/49/4/1602108.abstract N2 - To characterise Pseudomonas aeruginosa populations during chronic lung infections of non-cystic fibrosis bronchiectasis patients, we used whole-genome sequencing to 1) assess the diversity of P. aeruginosa and the prevalence of multilineage infections; 2) seek evidence for cross-infection or common source acquisition; and 3) characterise P. aeruginosa adaptations.189 isolates, obtained from the sputa of 91 patients attending 16 adult bronchiectasis centres in the UK, were whole-genome sequenced.Bronchiectasis isolates were representative of the wider P. aeruginosa population. Of 24 patients from whom multiple isolates were examined, there were seven examples of multilineage infections, probably arising from multiple infection events. The number of nucleotide variants between genomes of isolates from different patients was in some cases similar to the variations observed between isolates from individual patients, implying the possible occurrence of cross-infection or common source acquisition.Our data indicate that during infections of bronchiectasis patients, P. aeruginosa populations adapt by accumulating loss-of-function mutations, leading to changes in phenotypes including different modes of iron acquisition and variations in biofilm-associated polysaccharides. The within-population diversification suggests that larger scale longitudinal surveillance studies will be required to capture cross-infection or common source acquisition events at an early stage.P. aeruginosa co-infections occur in bronchiectasis; bacterial populations both adapt and diversify by mutation http://ow.ly/fMhj308zUv0 ER -